binder: add compat symbol

Required for older blobs

Change-Id: Ib18d2513570382432d49f302ab041230650372f2
Add BOARD_EGL_NEEDS_LEGACY_FB flags to SurfaceFlinger

To solve soft-reboot on Omni for p4wifi

Big thanks to Daniel Tjandra/AAccount

Change-Id: Id4a83ee3b636b0e2072497e74a37fc998dd85030